EN 1.4057 (X17CrNi16-2) Stainless Steel
EN 1.4057 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. 1.4057 is the EN numeric designation for this material. X17CrNi16-2 is the EN chemical designation.
The properties of EN 1.4057 stainless steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4057 stainless steel to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
11 to 17 %
Fatigue Strength
320 to 430 MPa 47 to 62 x 103 psi
Impact Strength: V-Notched Charpy
16 to 21 J 11 to 16 ft-lb
Poisson's Ratio
0.28
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
520 to 580 MPa 76 to 84 x 103 psi
Tensile Strength: Ultimate (UTS)
840 to 980 MPa 120 to 140 x 103 psi
Tensile Strength: Yield (Proof)
530 to 790 MPa 76 to 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
400 °C 760 °F
Maximum Temperature: Mechanical
850 °C 1560 °F
Melting Completion (Liquidus)
1440 °C 2620 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
25 W/m-K 14 BTU/h-ft-°F
Thermal Expansion
10 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
2.2 kg CO2/kg material
Embodied Energy
32 MJ/kg 14 x 103 BTU/lb
Embodied Water
120 L/kg 14 gal/lb
Common Calculations
PREN (Pitting Resistance)
16
Resilience: Ultimate (Unit Rupture Work)
96 to 130 MJ/m3
Resilience: Unit (Modulus of Resilience)
700 to 1610 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
30 to 35 points
Strength to Weight: Bending
26 to 28 points
Thermal Diffusivity
6.7 mm2/s
Thermal Shock Resistance
30 to 35 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4057 stainless steel is notable for containing comparatively high amounts of chromium (Cr) and nickel (Ni). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.
| Fe | 77.7 to 83.4 | |
| Cr | 15 to 17 | |
| Ni | 1.5 to 2.5 | |
| Mn | 0 to 1.5 | |
| Si | 0 to 1.0 | |
| C | 0.12 to 0.22 | |
| P | 0 to 0.040 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10272: Stainless steel bars for pressure purposes
EN 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels
EN 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
EN 10088-1: Stainless steels - Part 1: List of stainless steels
Corrosion of Stainless Steels, A. John Sedriks, 1996
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015